CN201383940Y - Direct current brushless electric lawn mower - Google Patents

Abstract

The utility model relates to a device in the technical field of lawn mowers, in particular to a direct current brushless electric lawn mower in the field of mowing. The device consists of a motor, a cutting knife, a power supply and other parts, wherein the cutting knife, the motor, a control mechanism, a chassis and the direct current power supply are arranged in a machine body, the motor is fixed in the middle of the chassis, an output shaft of the motor is directly connected with the rotary cutting knife arranged below the chassis, the control mechanism and the direct current power supply are respectively fixed above the chassis, the direct current power supply is mutually electrically connected with the control mechanism through a power cable, and all the parts are organically connected and combined to form the lawn mower with the integral structure. The direct current brushless electric lawn mower is mainly used for solving the technical problems of how to constitute a whole system by using the direct current power supply, the direct current brushless motor and a motor control system and the like. The direct current brushless electric lawn mower has the positive effects that the control system of the device is a brushless motor controller with the functions of soft start-up and self-braking, and the control mechanism can realize heat dissipation with the help of the chassis, thereby facilitating the future maintenance or replacement of the controller and simultaneously having the advantages of high efficiency, energy conservation, low noise, maintenance-free property, large torque, environmental protection and the like.

Description

The brush DC power-operated mower

Technical field

The utility model relates to a kind of device of mower technical field, refers to a kind of brush DC power-operated mower that is used to the field of mowing especially.

Background technology

At present, the various mowers of production and selling on the market, kind is numerous, and is each has something to recommend him, and most of is power source with the petrol engine, and it is power source with the DC electromotor with brush that part is also arranged.There is following shortcoming in existing gasoline mower: the petrol engine burns gasoline produces the gas of contaminated environment; Gasoline mower noise is big; Though and the brush direct current motor mower has solved problem of environment pollution caused, problems such as it still exists, and efficient is low, noise big, need maintenance.

Summary of the invention

In order to overcome above-mentioned weak point, it is the mower of power source that main purpose of the present utility model aims to provide a kind of dc brushless motor that adopts, and making it can be energy-efficient, and can make machine again is the brush DC power-operated mower that noise is low, non-maintaining and moment of torsion is big.

The technical problems to be solved in the utility model is: mainly solve the problem how dc source, dc brushless motor and electric machine control system constitute a total system; How also to solve controller by hall signal line and winding lead-out wire and relevant technologies problems such as dc brushless motor links to each other.

The technical scheme that its technical problem that solves the utility model adopts is: this device is made up of parts such as motor, cutter and power supplys, is provided with cutter, motor, controlling organization, chassis and dc source in fuselage from bottom to top successively, wherein:

One motor is fixed in the middle of the chassis, and motor output shaft directly connects the rotary cutting knife below the chassis;

One controlling organization and dc source are individually fixed in the top on chassis, and controlling organization is connected with motor with three phase winding lead-out wires by the hall signal line, and the interior controller of controlling organization is placed in the can, this can be mounted on the chassis directly over;

One direct current power supply is electrically connected with controlling organization mutually by power line;

More than the organic connection of each parts be combined as an integrally-built mower.

The motor of described brush DC power-operated mower is a dc brushless motor.

The voltage of the dc brushless motor of described brush DC power-operated mower is that 24v is to 48v.

The beneficial effects of the utility model are: the control system of this device is a brushless motor controller, controller links to each other with dc brushless motor with the winding lead-out wire by the hall signal line, the function that soft start is arranged and brake certainly, this controlling organization can dispel the heat by the chassis, is convenient to keep in repair from now on or changer controller more; Have simultaneously energy-efficient, noise is low, non-maintaining, moment of torsion big and help advantage such as environmental protection.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing 1 is the utility model overall structure schematic diagram;

Label declaration in the accompanying drawing:

The 1-cutter;

The 2-motor;

3-three phase winding lead-out wires;

4-hall signal line;

The 5-controlling organization;

The 6-chassis;

The 7-power line;

The 8-dc source;

Embodiment

See also shown in the accompanying drawing 1, the utility model is made up of parts such as motor, cutter and power supplys, the utility model is achieved through the following technical solutions: dc brushless motor is installed in the fuselage, motor output shaft connects rotary cutting knife, the fuselage top is equipped with controlling organization and dc source, and motor links to each other with dc source by control system.Described controlling organization is a brushless motor controller, places in the can, and can is installed on mower shell top.By DC power supply, controller control dc brushless motor, the rotation of driven by motor cutter.

Be provided with cutter, motor, controlling organization, chassis and dc source in the fuselage of the present utility model from bottom to top successively, on structure: please in conjunction with shown in Figure 1:

The motor 2 of present embodiment brush DC power-operated mower is fixed in the middle of the chassis 6, motor 2 output shafts directly connect the rotary cutting knife 1 below the chassis, controlling organization 5 and dc source 8 are fixed in 6 tops, chassis, controlling organization 5 is connected with motor 2 with triple line 3 by hall signal line 4, and dc source 8 is connected with controlling organization 5 by power line 7.Controllers in the controlling organization 5 place in the can, again box is installed on chassis 6 directly over, controlling organization 5 can be by chassis 6 heat radiations, also are convenient to keep in repair from now on or changer controller more.

Operation principle of the present utility model:

Dc source 8 is given controlling organization 5 by power line 7 power supplies, controlling organization 5 utilizes the position of the signal detection permanent magnetism magnetic pole of hall signal line 4, controlling organization 5 carries out logic decoding generation driving signal according to the signal of hall signal line 4, driving signal is undertaken controlling six transistorized conductings orders after the power amplification by drive circuit, control the power-up sequence of three phase winding lead-out wires 3 in view of the above, three phase windings energising in turn make motor produce the stable electromagnetic torque that continues, the magnetic field interaction that three phase windings produce stable electromagnetic torque that continues and rotor magnetic steel generation makes the lasting rotation of rotor stability, thereby makes the motor 2 stable rotations that continue.Motor drives the cutter rotation by output shaft, thereby realizes the mowing function.

During motor 2 startings, rotating speed is zero, and promptly the winding induced electromotive force is zero, and DC bus-bar voltage all is added in the winding impedance, causes starting current very big, and the safe operation that jeopardizes motor 2 and controlling organization 5 is so adopt current limit starting.Detect bus current by detecting ohmically voltage signal, when electric current surpasses limit value, block inverter and drive signal, the winding current path is ended, force winding current to descend; When electric current is lower than a certain value, opens inverter again and drive signal, so circulation, the current limit starting of realization motor 2.

Though the utility model is described with reference to current specific embodiment, but those of ordinary skill in the art should be realized that, above embodiment is used for illustrating the utility model, under the situation that does not break away from the utility model spirit, also can make the variation and the modification of various equivalences, therefore, as long as to the variation of the foregoing description, conversion all will drop in the scope of the utility model claims in connotation scope of the present utility model.

Claims (3)

1, a kind of brush DC power-operated mower, this device comprises motor (2), cutter (1) and power supply, it is characterized in that: in fuselage, be provided with cutter (1), motor (2), controlling organization (5), chassis (6) and dc source (8) from bottom to top successively, wherein:

One motor (2) is fixed in the middle of the chassis (6), and motor (2) output shaft directly connects the rotary cutting knife (1) below the chassis (6);

One controlling organization (5) and dc source (8) are individually fixed in the top of chassis (6), controlling organization (5) is connected with motor (2) with three phase winding lead-out wires (3) by hall signal line (4), controller in the controlling organization (5) is placed in the can, this can be mounted on chassis (6) directly over;

One direct current power supply (8) is electrically connected with controlling organization (5) mutually by power line (7);

More than the organic connection of each parts be combined as an integrally-built mower.

2, brush DC power-operated mower according to claim 1 is characterized in that: described motor (2) is a dc brushless motor.

3, brush DC power-operated mower according to claim 2 is characterized in that: the voltage of described dc brushless motor is that 24v is to 48v.

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